一阶惯性环节

一阶传递函数G(s)=1/(3s+6) 一阶单位阶跃响应 >> num=[0,1]; >> den=[3,6]; >> step(num,den)

00.51 1.52 2.53

0.020.040.060.080.10.120.140.16

0.18Step Response

Time (sec)

A m p l i t u d e

一阶单位脉冲响应 >> num=[0,1]; >> den=[3,6]; >>impulse(num,den)

00.51 1.52 2.53

0.05

0.1

0.15

0.2

0.25

0.3

0.35

Impulse Response

Time (sec)

A m p l i t u d e

二阶传递函数X 0(s)=25/(s ²+2×ζ×5s+25) 欠阻尼﹙ζ=0.5﹚ >> num=[0,25] >> den=[1,0.5,25] >> step(num,den)

0510

152025

0.20.40.60.811.21.41.61.8

2Step Response

Time (sec)

A m p l i t u d e

临界阻尼（ζ=1） >> num=[0,25] >> den=[1,1,25] >> step(num,den)

024681012

0.20.40.60.811.21.41.6

1.8Step Response

Time (sec)

A m p l i t u d e

过阻尼状态（ζ=1.4） >> num=[0,25] >> den=[1,1.4,25] >> step(num,den)

012345678

0.20.40.60.811.21.41.6

1.8Step Response

Time (sec)

A m p l i t u d e

负阻尼状态（ζ=-1.3） >> num=[0,25]; >> den=[1,-1.3,25]; >> step(num,den)

00.51 1.52 2.53 3.54

-15

-10

-5

05

10

Step Response

Time (sec)

A m p l i t u d e